Safe lock



p 9, 1 G. A. CARDELL 2,427,122

SAFE LOCK Filed Aug. 28, 1945 George A. Carr/ell swam/ M I 3 of each individual dog and open the safe without prior knowledge of the combination.

In accordance with'the present invention, in order to prevent the opening of the safe by this method, dogs 30 are provided, at their outer ends, with polygonal-shaped portions 33 (shown in the present illustrative drawings as being of a hexag-I 'i i onal shape) onl one edge 34 is coextensive with surface 3| of the dog. Portion 33 is of suflicient thickness so that even when an edge is' aligned with bore l5 and the door canted as far as possible, the perimeter of I the polygonal portion and not the surface 32 of the dog will engage the edge of shoulder l6. As a result, it is impossible to feel the-combination as hereinabove described, Since all aligned positions feel alike; there is only one chance in six (Where hexagonal portions are used) that, having aligned one edge of a portion 33 with the bore t5, the tamperer will have discovered, the proper edge 34 which is coextensive with surface 3! of the dog,

-It will be seen from the description that the present invention represents a distinct advancement in rendering a safe tamper-proof. My arrangernent thwarts persons attemptin to feel the combination, because the polygonal-shaped portion intervenes between the main locking dog and the inner shoulder and provides, in effect, a plurality of false combinations, all of which "feel the same as the true combination, thus Each edge of a polygonal-shaped portion 33 is adapted to align with bore I5 but 2. In a safe, a casing having a bore, an annular shoulder at the inner end of said bore, a door slidably fitting in said bore; a rotatable lock shaft longitudinally disposed in said door, extending inwardly therefrom and secured thereto against longitudinal displacement; a locking dog fixed on the inner end of said shaft and projecting laterally behind said shoulder, said dog having a surface on the periphery thereof alignable with said bore; and a portion on the outer end of said dogextending behind said shoulder having a plurality of edges alignable with said bore, one

of said edges being coextensive with said surface.

, of said shafts and projecting laterallybehind making it impossible for the tamperer to open the safe by anything other than guess work, The chances that an unauthorized person could open a safe incorporating the present invention are negligible. In" the present instance, six-sided portions are provided on the dogs and there are six dogs; thus, the chance of discovering the right combination is only one in 46,656 (or 6 This ratio can be-further reduced by increasing the number of edges on the'polygonal-shaped portion and the number of shafts and locking dogs employed. The number shown in the present i1- lustrative drawings have been found to be adequate to thoroughly protect the safe against tampering individuals. It will also be seen that the said shoulder, surfaces on the periphery of said dogs alignable with said bore; and polygonalshaped portions on the outer ends of said dogs having a plurality of edges alignable with said bore, one of said edges being coextensive with the said surfaces on said dogs.

l. In a safe, a, peripheraly flanged casing having a bore, a shoulder at the inner end of said bore, a door slidably fitting in said bore and removable therefrom, said door having a plurality of longitudinal holes therethrough; a plurality of rotatable lock shafts in said holes, secured therein against longitudinal displacement and extending inwardly from said door locking dogs fixed to the inner ends of said shafts and pro-- jecting laterally behind said shoulder, each dog having a surface on the periphery thereof alignable with said bore; and raised portions on the outer ends of said dogs extending laterally behind said shoulder and having a pluralityof edges on present invention does not interfere with or make more difficult the opening of a safe when the proper combination is known.

- As many changes could be made in the above construction and many apparently widely different'embodiment of this invention could be made without departing'from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the language used in the following claims-is intended to cover all of the genericand specifiic features of the invention herein described and all statements of the scope of the invention which, as a matter of language, might be said to fall therebetween.

I claim as my invention:

1. In asafe, a casing having a bore, a shoulder at the inner end of said bore; a door slidably fitting in said bore; a rotatable lock shaft longitudinally disposed in said door, extending inwardly therefrom and secured thereto against longitudinal displacement; a locking dog fixed to the innerend of said shaft and projecting laterally behind said shoulder; a surface on saiddog alignable with said bore; and a raised portion on said dog-extending from the outer end thereof.

- alignable with said bore.

the periphery thereof alignablewith said' bore, one of said edges being coextensive with said surface. V

5. In a safe of the characterdescribeda casing having a plurality of peripheral flanges, said casing also having a bore, an annular shoulder adjacent the inner end of said bore; a, door slidably fitting in said bore and having a plurality of longitudinal holes therethrough; rotatable lock shafts in said holes, extending inwardly therefrom and secured against longitudinal displacement, the outer ends of 'said shafts bein'gpo'sitioned inwardly from the outer face of said door; means including a'stem insertableinto saidholes and engageable with said shafts for rotating said shafts from the outer face of said door, locking dogs fixed to the inner ends of said shafts and projecting laterally behind saidshoulder, and a surface on the periphery. of eachof said dogs GEORGE A. CAR Erin REFERENCES CITED,

The following references are file of this'patent:

of record in, the

Number Name s 2,319,931 Jandus 'May 25,1943 27,202 Carpenter 'F eb. 21, 1860 243,636 Sevi'er June 28,1881 1,320,919 Reynolds Nov. 4,1919 

